Quick Read

  • A single retiree earning $150,000 annually hits the 22 to 24 percent federal tax bands and a $4,300 Medicare surcharge that a married couple at the same income avoids entirely.

  • After federal taxes, state taxes, and health premiums, $12,500 in monthly gross income shrinks to roughly $9,400 in real spending money.

  • With RMDs starting at 73, Roth conversions that fill the 22% bracket without crossing the $137,000 IRMAA threshold are the highest-leverage move available now.

  • Many financial professionals are salespeople paid on what they push, not whether you end up wealthier. A fiduciary is the opposite. The SEC legally requires them to put your interests first. Advisor.com’s free matching tool pairs you with vetted fiduciaries from major national firms, all in under three minutes. See who you match with today.

A 68-year-old single woman is enjoying retirement. Monthly, she gets $3,100 from Social Security, $5,400 from a $1.6 million portfolio at a 4% withdrawal rate, and a $4,000 pension. Add it up and she has $12,500 a month, or $150,000 a year.

A senior woman with white, curly hair and a light blue denim shirt sits at a wooden table in a bright kitchen. She is focused on papers in her hands, holding a blue pen, with a silver laptop and a white coffee cup on a saucer to her left. The background shows light-colored kitchen cabinets, a wooden bread box, and a sunny window with a potted plant. shurkin_son / Shutterstock.com

But how much does she really get each month? And is she at a disadvantage compared to married couples?

Why Single Filers Get Squeezed

Every meaningful threshold in the retirement tax code arrives at roughly half the married-filing-jointly number. Two spouses splitting $150,000 land in comfortable territory. One person with the same $150,000 is treated differently.

Look at the 2026 single brackets: 12% starts at $12,400, 22% starts at $50,400, and 24% starts at $105,700. Her taxable income, after the $16,100 standard deduction and the additional senior deduction added by the One Big Beautiful Bill for taxpayers 65 and older, runs deep into the 22% band and clips the 24% band. A married couple with identical gross income would top out in the 12% band.

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Medicare punishes single filers the same way. The standard 2026 Part B premium is $202.90 a month, with no IRMAA surcharge at or below $109,000 of modified adjusted gross income. The first surcharge tier runs from $109,000 to $137,000, and the second tier runs from $137,000 to $171,000. At $150,000 she sits squarely in tier two, which pushes her total Medicare cost to roughly $4,300 a year before any Medigap or drug plan. A married couple would need $274,000 to hit that same surcharge.

What $9,400 a Month Actually Buys

After federal tax, state tax, and health premiums, she nets roughly $9,400 a month in real spending money. With the mortgage gone, that covers groceries, utilities, property tax, and insurance. She funds about $15,000 a year of travel, writes generous birthday and holiday checks to nieces and nephews, and still adds to a taxable brokerage account most months. Inflation is a real headwind, and the 2027 Social Security COLA is tracking near 3%, which helps but does not fully offset healthcare and property-tax creep.

One Move That Could Help

Her required minimum distributions begin at age 73, not 75, because SECURE 2.0’s age-75 start applies only to people born in 1960 or later. That gives her a narrow window to reshape the tax profile of the $1.6 million portfolio, the same low-tax gap between the last paycheck and the first RMD that we sized up in a free Roth conversion guide here. Two levers to consider:

  1. Roth Conversions in the Pre-RMD Window: Filling the top of the 22% bracket with conversions now, before mandatory withdrawals stack on top of pension and Social Security income, prevents a permanent slide into the 24% band later. It also shrinks future IRMAA exposure, since Roth withdrawals do not count toward MAGI. The catch: each conversion raises this year’s MAGI and can trigger the very IRMAA tier she is trying to escape. The right size is usually the amount that fills the 22% bracket without crossing a Medicare threshold.

  2. Qualified Charitable Distributions at 70½: Once eligible, she can send IRA dollars directly to charity, satisfying part of the eventual RMD without adding a dime to taxable income or MAGI. For someone who already gives, this makes a lot of sense.

What to Evaluate First

Map every dollar of projected income against the 24% bracket line at $105,700 and the IRMAA tier-two line at $137,000, then decide how much Roth conversion room exists between now and age 73.

Every year of pre-RMD flexibility skipped is a year of Roth conversion capacity gone for good. A fee-only advisor earns their keep here because the IRMAA cliff, the 22-to-24% jump, and the taxation of Social Security all sit within a few thousand dollars of one another. Single retirees need a written tax plan more than couples do, because every guardrail arrives at half the income.

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